Promotion of Synthesis of TiAl Intermetallic Powder by Introducing Nitrogen into Milling Atmosphere

Hitoshi Hashimoto, Shinichi Sumi, Toshihiko Abe, Koichi Kamada, Toshihiro Yoshida
1995 Journal of the Japan Society of Powder and Powder Metallurgy  
We observed the formation process of Ti-Al intermetallic compound powder during mechanical alloying of a powder mixture of Ti and Al by using a tumbling ball mill and found that the formation of the intermetallic compound powder was promoted by nitrogen gas in a milling atmosphere . Based on this finding, we introduced a small quantity of nitrogen gas into the milling atmosphere in order to shorten the time required for producing the intermetallic compound powder and to improve its yield. As a
more » ... esult, we found that an intervenient introduction of 1vol .% nitrogen gas into the milling atmosphere can achieve a yield of 98.8% after milling for 1440ks .
doi:10.2497/jjspm.42.1196 fatcat:oy6tm7ya2rcttbqxazlvfqohse